.board_container {
  width: 100%;
  height: 300px;
  border: 1px solid springgreen;
}
.message {
  width: 100%;
  height: 40px;
  background-color: yellow;
  display: inline-flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2px;
}
